@article{GDZPPN00236199X, title = {Root multiplicities and ideals in quasisimple Lie algebras.}, journal = {Mathematica Scandinavica}, volume = {73}, year = {1993}, pages = {15-20}, zbl = {0792.17020}, url = {http://dml.mathdoc.fr/item/GDZPPN00236199X} }
Aslaksen, Helmer; Wahl, Terje. Root multiplicities and ideals in quasisimple Lie algebras.. Mathematica Scandinavica, Tome 73 (1993) pp. 15-20. http://gdmltest.u-ga.fr/item/GDZPPN00236199X/